The press roll of wear-resistant liner PFG has a layer of wear-resistant liner which has been overlaid. This wear-resistant liner can be used for overlaying the solid shaft or the hot press fit bushing. The worn surface can be restored by hardfacing. If necessary, the repair of the damaged point or the surfacing of the whole surface can be carried out without moving the roller. In order to facilitate the formation of extrusion cake, HRP roller press has an electric feeding control door, which can make feeding start smoothly and help to adjust the output or energy consumption of roller press. When dealing with various types of materials, it is beneficial to set up the feeding control door, but it is necessary to form the material cake. The roller press can be configured to form the grinding system in the following ways: as a pre grinding machine, the roller press can grind the new feed, and the ground material then enters the grinding circuit of the ball mill. As a semi final grinding equipment, PFG roller press operates in a closed circuit together with the disperser and the dynamic powder concentrator. Fine materials are finally ground in a single chamber ball mill. In this configuration, PFG roller press can be arranged more compact and efficient by using two-stage powder concentrator and ball mill to work together. For some types of feed and some final products, PFG roller press can be used as the final grinding system without ball mill. PFG roller press and two-stage powder concentrator are operated in closed circuit. This configuration can make the operation and investment cost lower.